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Bug 926268 - Don't include the full frame bounds in nsDisplayBorder if we're only painting one side. r=roc

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This commit is contained in:
Matt Woodrow 2013-12-09 12:01:30 +13:00
parent 9d3c6097af
commit af8e5172d6
1 changed files with 23 additions and 3 deletions
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26
layout/base/nsDisplayList.cpp
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@ -2548,10 +2548,30 @@ nsDisplayBorder::Paint(nsDisplayListBuilder* aBuilder,
nsRect
nsDisplayBorder::GetBounds(nsDisplayListBuilder* aBuilder, bool* aSnap)
{
nsRect borderBounds(ToReferenceFrame(), mFrame->GetSize());
borderBounds.Inflate(mFrame->StyleBorder()->GetImageOutset());
*aSnap = true;
return borderBounds;
const nsStyleBorder *styleBorder = mFrame->StyleBorder();
nsRect borderBounds(ToReferenceFrame(), mFrame->GetSize());
if (styleBorder->IsBorderImageLoaded()) {
borderBounds.Inflate(mFrame->StyleBorder()->GetImageOutset());
return borderBounds;
} else {
nsMargin border = styleBorder->GetComputedBorder();
nsRect result;
if (border.top > 0) {
result = nsRect(borderBounds.X(), borderBounds.Y(), borderBounds.Width(), border.top);
}
if (border.right > 0) {
result.UnionRect(result, nsRect(borderBounds.XMost() - border.right, borderBounds.Y(), border.right, borderBounds.Height()));
}
if (border.bottom > 0) {
result.UnionRect(result, nsRect(borderBounds.X(), borderBounds.YMost() - border.bottom, borderBounds.Width(), border.bottom));
}
if (border.left > 0) {
result.UnionRect(result, nsRect(borderBounds.X(), borderBounds.Y(), border.left, borderBounds.Height()));
}
return result;
}
}
// Given a region, compute a conservative approximation to it as a list